Author Affiliations
School of Information and Communication Engineering, North University of China, Taiyuan, Shanxi 030051, Chinashow less
Fig. 1. Cross-section view of lining bonding structure
Fig. 2. Experimental device for laser ultrasonic monitoring of lining solidification
Fig. 3. Propagation path of ultrasonic wave in specimen. (a) Echo paths for the first nine times; (b) path of echo Ⅰ; (c) path of echo Ⅱ; (d) path of echo Ⅲ; (e) path of echo Ⅴ
Fig. 4. Propagation path of ultrasonic wave in bonding structure of metal plate lining. (a) Simulation cloud image of ultrasonic entering metal plate with thickness of 5 mm; (b) simulation cloud image of ultrasonic entering metal plate with thickness of 1.5 mm; (c) simulation cloud image of ultrasonic entering metal plate with thickness of 3 mm
Fig. 5. Detection point and A-scan signal in bonding structure of metal plate lining. (a) Detection point in bonding structure; (b) A-scan signal at detection point
Fig. 6. Simulated cloud images of the first nine echo arrival times. (a) Echo Ⅰ; (b) echo Ⅱ; (c) echo Ⅲ; (d) echo Ⅳ; (e) echo Ⅴ; (f) echo Ⅵ; (g) echo Ⅶ; (h) echo Ⅷ; (i) echo Ⅸ
Fig. 7. Laser ultrasonic monitoring of typical signal of lining solidification. (a) Time domain diagram of typical signal of aluminum lining bonding structure; (b) frequency domain diagram of typical signal of aluminum lining bonding structure; (c) time domain diagram of typical signal of steel plate lining bonding structure; (d) frequency domain diagram of typical signal of steel plate lining bonding structure
Fig. 8. Components of echo I arrival time
Fig. 9. Propagation principle of ultrasonic wave
Fig. 10. Variation curves of Z2 with different variables. (a) Variation curve of Z2 with A; (b) variation curve of k with D
Fig. 11. Echo I signal of lining in different states. (a) Echo Ⅰ signal of aluminum lining bonding structure; (b) echo Ⅰ signal of steel plate lining bonding structure
Fig. 12. Frequency domain diagram of echo Ⅰ signal in different states of lining. (a) Frequency domain diagram of echo Ⅰ signal of aluminum lining bonding structure; (b) frequency domain diagram of echo Ⅰ signal of steel plate lining bonding structure
Fig. 13. B-scan of echo I. (a) B-scan of echo I of aluminum lining bonding structure; (b) B-scan of echo I of steel plate lining bonding structure
Material | Ⅰ | Ⅱ | Ⅲ | Ⅳ | Ⅴ | Ⅵ | Ⅶ | Ⅷ | Ⅸ |
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1060 aluminum | 2.50 | 3.44 | 4.06 | 4.38 | 5.00 | 5.32 | 5.62 | 5.94 | 6.26 | 201 steel | 2.50 | 3.50 | 4.20 | 4.50 | 5.20 | 5.52 | 5.88 | 6.20 | 6.54 |
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Table 1. Arrival time of the first nine echoesunit: μs
Lining state | Aluminum lining bonding structure | Steel plate lining bonding structure |
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Echo Ⅰ arrival time /μs | Ultrasonic transit time /μs | Ultrasonic speed /(m·s-1) | Relative sound attenuation /Np | Echo Ⅰ arrival time /μs | Ultrasonic transit time /μs | Ultrasonic speed /(m·s-1) | Relative sound attenuation /Np |
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Drawing state | 2.52 | 0.87 | 1609 | 0.56--0.60 | 2.50 | 0.81 | 1605 | 0.71--0.76 | Semi-cured state | 2.50 | 0.85 | 1647 | 0.51--0.56 | 2.48 | 0.79 | 1646 | 0.68--0.71 | Fully-cured state | 2.48 | 0.83 | 1687 | 0.46--0.51 | 2.46 | 0.77 | 1688 | 0.66--0.68 |
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Table 2. Characteristic parameters of lining in different states